Fix crash when feedURL is nil for some reason.
Corrected configs.
Add ability to override update installation process.
Add ability to skip install in finish_installation tool.
Fixed compile errors after pre commit.
Add possibility to check update is in progress.
Safer work with NSConnection
Fix automatic updates preference for non main bundle. Related issue: CMM-976
Small layout fixes.
Corrected method name.
Implemented updaters queue.
Made it impossible to add duplicated updaters to queue.
Corrected finish_install toll for case when only components install needs.
Added additional delegate methods.
Finished updater queue task.
Merge branch 'develop'
For ReleaseNotes: 1) Added SUUpdaterQueue class; 2) Added additional delegate methods; 3) Made it possible to check if updater is in installation process while installing with finish_installation utility.